At Maryland's Aberdeen Proving Ground U. S. Army researchers continue to use vervet monkeys in their attempt to create the effects of a nerve agent attack. Moneys can be used every 60 days for as long three years. You can be sure they don't like being treated this way. Neither would dogs, cats, or other animals. 

Monkeys are highly emotional and sentient beings who are able to suffer and experience deep and enduring pain. The procedure used in the nerve gas experiment causes them to profusely salivate, vomit, twitch violently, and experience uncontrollable seizures. Some stop breathing. The violent reaction of the monkeys to the gas has been described by one of the trainees as similar to "a chiwawa [sic] shitting razor blades." Would you allow your dog to be subjected to such heinous treatment? The monkeys are no less sentient or disposable and their emotional lives must be factored into the ways in which they're used and abused in research.